I have the same problem -- the Format pull down menu is simply not listed in the menu bar. The choices are File, Edit, View, Data, Window and Help.
Any idea how to get the Format pull-down back?
UPDATE: I figured it out. For the benefit of of others:
View --> Toolbars --> Customize Toolbars/Menus --> then select the Commands button at the top of the window --> in Categories, select 'built-in Menus', then drag then 'Format' menu into Pull-down menu window that appeared.